Its predecessor, aminopterin was introduced in 1948 as a cancer treatment. By the early 1950’s small studies of aminopterin in patients with rheumatoid arthritis (RA), psoriasis and psoriatic arthritis demonstrated efficacy but the drug was slow to capture the interest of rheumatologists, perhaps because of the landmark discovery of cortisone, also in 1948, one of the first “miracle drugs.”In 1962 methotrexate, a modified version of aminopterin, was introduced. Avloclor 250mg chloroquine phosphate Define chloroquine Plaquenil pronunciation Hydroxychloroquine dosing information. Usual Adult Dose for Malaria Treatment of the acute attack 800 mg 620 mg base followed in 6 to 8 hours by 400 mg 310 mg base, then 400 mg 310 mg base once a day for 2 consecutive days; alternatively, a single dose of 800 mg 620 mg base has also been effective The action of hydroxychloroquine is cumulative and may require weeks to months to achieve the maximum therapeutic effect see CLINICAL PHARMACOLOGY. Initial adult dosage 400 mg to 600 mg 310 to 465 mg base daily, administered as a single daily dose or in two divided doses. It’s used in people with Sjogren’s syndrome, rheumatoid arthritis, and lupus to relieve joint pain, fatigue, and rashes. It may take up to 12 weeks for you to notice the effects of hydroxychloroquine. Hydroxychloroquine is safe, even for pregnant women with Sjogren’s syndrome. Small, successful clinical trials of methotrexate for RA, psoriasis and psoriatic arthritis followed its introduction and the case for its use in these disorders slowly built. Both inhibited the enzyme folic acid reductase, but methotrexate was easier to produce, making it easier to meet the growing demand for its use in cancer treatment. Hydroxychloroquine dosing for sjogrens Study Raises Questions about Sjogren's and Plaquenil, Plaquenil Dosage Guide - Complications of chloroquineChloroquine phopshate usp Rheumatoid Arthritis. The action of hydroxychloroquine is cumulative and may require weeks to months to achieve the maximum therapeutic effect see CLINICAL PHARMACOLOGY. Initial adult dosage 400 mg to 600 mg 310 to 465 mg base daily, administered as a single daily dose or in two divided doses. Plaquenil Hydroxychloroquine Uses, Dosage, Side Effects.. Medications for Sjogren’s Syndrome NYU Langone Health. Plaquenil dosage. Plaquenil Hydroxychloroquine is used to treat and prevent malaria infection, and to reduce symptoms and progression of autoimmune diseases such as lupus & others. Detailed Hydroxychloroquine dosage information for adults and children. Includes dosages for Rheumatoid Arthritis, Systemic Lupus Erythematosus, Malaria Prophylaxis and more; plus renal, liver and dialysis adjustments. Hydroxychloroquine Plaquenil, a drug designed to treat malaria, is often helpful in treating Sjogren's syndrome. Drugs that suppress the immune system, such as methotrexate Trexall, also might be prescribed.